DE1075047B - Centrifuge for separating sludge-containing liquids with a pre-separation chamber without an insert plate - Google Patents

Description

GERMAN

The invention relates to a centrifuge for separating sludge-containing liquids with a Pre-separation chamber is provided without an insert plate, in which the easily separable part of the sludge is deposited, and with a separation chamber with conical insert plates, which form the pre-separation chamber it is arranged that the part of the centrifugal material from which the most easily separable sludge is deposited is fed to the separation chamber for further treatment.

The distribution of the particles and the concentration of the sludge in the one in the separation chamber Centrifuge with conical insert disks introduced liquid is essential for the efficiency of the centrifuge of vital importance. The sludge content of the separated liquid almost increases proportional to the sludge content of the liquid introduced. This also applies if the Liquid contains large amounts of sludge made of a material that is particularly light is detachable.

Normally, a plate insert is not required for the separation of such easily separable particles. On the contrary, the easily separable particles impair the ability of the plate insert to the difficult to separate particles to deposit, making them more of a hindrance to the represent effective use of a separation chamber provided with insert plates. From this it follows that that the possibility must be created to increase the separation efficiency in that the The plate insert is only used to remove the small, difficult-to-separate particles will.

The separation is often carried out in two stages, for example in the first stage the large, easily separable particles are separated by cyclones, while the smaller, Difficult to separate particles are separated in a centrifuge with conical insert plates. Such However, facilities are expensive. It is therefore often only on a single stage and the separation process limited the degree of separation achieved by this.

Furthermore, it has already been proposed to carry out the spinning in two stages in centrifuges with two one behind the other in the same vessel arranged separation chambers are provided, whereby the described Disadvantages can be avoided.

However, in cases in which liquids with a relatively high sludge content are treated and the separated sludge is to be continuously discharged from the centrifuge, other difficulties arise. This is due to the fact that centrifuge for separating sludge-containing liquids with a pre-separation chamber

without insert plate

Applicant:
Aktiebolaget Separator, Stockholm

Representative: Dr.-Ing. H. Ruschke, Berlin-Friedenau,

and Dipl.-Ing. K. Grentzenberg,
Munich 27, Pienzenauerstr. 2, patent attorneys

Claimed priority:
Sweden 22 January 1957

Nore Einar Bergner, Stockholm,
has been named as the inventor

due to the separation of the easily separable sludge in the pre-separation chamber the per unit of time is reduced amount of sludge separable in the separation chamber. A continuous discharge of this Sludge through nozzles therefore requires special measures to achieve the required sludge concentration in them to be maintained, otherwise too large quantities of the liquid contained in the material to be centrifuged Component can be discharged through the nozzles because the number and size of the nozzles usually cannot be decreased sufficiently to prevent this. Such a measure can be included consist, a larger or smaller part of the sludge discharged through the nozzles to them returned again. However, this means a complication, which according to the invention by the arrangement of two separation chambers is avoided, each in connection with a sludge chamber stand, and in that these sludge spaces on the periphery directly with sludge discharge openings, for example, nozzles that are common to both are in communication.

The invention is described in more detail with reference to the drawing, namely FIGS. 1 and 2 show partly in longitudinal section, two embodiments of a centrifuge according to the invention.

The centrifugal drums shown in the drawing have a lower part 1 and an upper part 2 on and a locking ring 3, which both parts

909 728/193

JL U /

holds together, and a distributor 4 to which the material to be separated is fed via an inlet pipe 5.

In the centrifuge shown in Fig. 1, the material to be centrifuged is from the distributor 4 via channels 6 to the Underside of a plate 7 arranged below the distributor is fed to a pre-separation chamber 8, which above the plate 7 is arranged and provided with conveyor blades or vanes that are more or less extend far into a sludge space 9 located outside the separation chamber. This mud room is limited by the lower part 1 and by a projection 10 protruding from the distributor. The pre-separation chamber 8 communicates with the separating chamber 12 via channels 11, which are provided with insert plates 13 is. The insert plates 13 have openings that correspond to the mouth of the channels 11 in the separation chamber 12 related. Outside the separation chamber 12 is a sludge space 14 Sludge outlet openings or nozzles 15 are provided which are arranged so that they also act as outlets serve for the sludge chamber 9.

The centrifugal material is introduced into the outer part of the pre-separation chamber 8 and then occurs around the Outer edge of the plate 7 around. Here, as in the pre-separation chamber, the easily separable, coarser sludge particles, which are thrown into the sludge space 9. The remaining part of the material to be centrifuged flows inwards through the pre-separation chamber to the inner ends of the Channels 11 and is conveyed through these into the separation chamber 12.

In the spaces between the insert plates in the separation chamber 12, the smaller, difficult to separate particles separated and get into the sludge space 14, while the separated Liquid exits through the outlets 16 which are provided in the central part of the separation chamber.

The centrifuge shown in FIG. 2 differs from the embodiment according to FIG. 1 only with regard to the type of feed of the material to be centrifuged. In the arrangement according to FIG. 2, the channels 6 α are arranged between the two separating chambers that they cross the channels 11 which connect the two separating chambers, which is achieved in that the plate 7 α in this case at the top of the Pre-separation chamber 8 a is arranged. In order to prevent the inward flow of the material in the pre-separation chamber from making the separation of the coarser sludge particles difficult and hindering their path to the sludge chamber 9, the outer edge of the plate 7 a is corrugated in such a way that special channels 17 are formed through which the easily separable sludge is passed from the separation chamber 8 a to the outside to the sludge chamber 9, while the material to be centrifuged from the channels 6 a is passed to the side of the special channels in the separation chamber.

The centrifuged material from the channels 6 a flows this to the outer edge of the plate Ta only along a part of its circumference around. The sludge particles that move outwards to the sludge chamber 9 are disturbed as little as possible by the centrifuged material, which flows from the channels 6 a in the opposite direction into the pre-separation chamber 8 a . In this case, too, the pre-separation chamber is provided with conveying vanes or paddles, which are

ίο Extend a little way into the mud room.

The centrifuge of Fig. 1 can be provided with a partition 18, which the inside and outward currents in the space between the outer edge of the plate 7 and the underside of the plate 4 separate from each other. The task of the partition is to divide the room so that in the lower part, the material to be centrifuged flows essentially inwards to the pre-separation chamber 8, while in its upper part received an outwardly directed flow of easily separable sludge will.

Claims (2)

Patent claims: 1. Centrifuge for separating sludge-containing liquids with a pre-separation chamber without Insert plate in which the most easily separable part of the sludge is deposited, and a separation chamber, which is provided with a conical plate insert and with the pre-separation chamber is connected in such a way that the part of the material to be centrifuged from which the most easily separated Sludge is separated, is fed to the separation chamber for further treatment, characterized in that the two separation chambers each have a sludge chamber (9, 14) in Are connected and these mud spaces on their periphery directly with each other and with Sludge discharge openings (15), ζ. B. nozzles, are in communication. 2. Centrifuge according to claim 1, characterized in that that the pre-separation chamber (8, 8 a) on its outer circumference with a plate (7, 7c) Od. The like. Is provided, the centrifugal material entering this chamber from the channels (6, 6 a) its direction of flow changes by flowing around the edge of this plate, and that from the Pre-separation chamber in the sludge chamber leading partitions (17, 18) are provided which the Currents that are directed inwards at the overflow edge and those from the pre-separation chamber (8, 8 a) to the sludge chamber (9) outwardly directed currents essentially from one another separate. Considered publications:
U.S. Patent No. 2,485,209. 1 sheet of drawings